Source:http://linkedlifedata.com/resource/pubmed/id/15178874
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
Pt 6
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pubmed:dateCreated |
2004-6-4
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pubmed:abstractText |
4',4'-Dimethyl-2-methylsulfanyl-3,4,5,6,7,8-hexahydropyrido[2,3-d]pyrimidine-6-spiro-1'-cyclohexane-2',4,6'-trione, C(15)H(19)N(3)O(3)S, (I), has a markedly polarized molecular-electronic structure, and the molecules are linked into a three-dimensional framework by a combination of N-H.O, C-H.O and C-H.pi hydrogen bonds. 8-Hydroxymethyl-4',4'-dimethyl-2-methylsulfanyl-3,4,5,6,7,8-hexahydropyrido[2,3-d]pyrimidine-6-spiro-1'-cyclohexane-2',4,6'-trione, C(16)H(21)N(3)O(4)S, (II), where the hydroxymethyl substituent is disordered over two sets of sites, has a much less polarized structure than (I); the molecules are linked by a combination of O-H.O and N-H.O hydrogen bonds into chains containing alternating R(2)(2)(8) and R(2)(2)(16) rings, and these chains are linked into sheets by a combination of a pi-pi stacking interaction and a C-H.O hydrogen bond. 8-Ethoxymethyl-2-methoxy-4',4'-dimethyl-3,4,5,6,7,8-hexahydropyrido[2,3-d]pyrimidine-6-spiro-1'-cyclohexane-2',4,6'-trione, C(18)H(25)N(3)O(5), (III), has an unpolarized electronic structure, and a combination of N-H.O, C-H.O and C-H.pi hydrogen bonds links the molecules into sheets.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:status |
PubMed-not-MEDLINE
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pubmed:month |
Jun
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pubmed:issn |
0108-2701
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
60
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
o438-43
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pubmed:year |
2004
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pubmed:articleTitle |
Three hexahydropyridopyrimidine-spiro-cyclohexanetriones: supramolecular structures generated by O-H...O, N-H...O, C-H...O and C-H...pi hydrogen bonds, and pi-pi stacking interactions.
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pubmed:affiliation |
Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, Scotland.
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pubmed:publicationType |
Journal Article
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